# CVE-2025-65085: Heap-based Buffer Overflow in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share

> Heap-based buffer overflow in Ashlar-Vellum CAD applications allows attackers to execute arbitrary code or disclose information.

- **Severity:** High 8.4 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 25 Nov 2025
- **Updated:** 12 May 2026
- **Also known as:** GHSA-frm4-p95x-pr4g

## What is CVE-2025-65085?

CVE-2025-65085 is a high-severity memory corruption vulnerability in Ashlar Cobalt, published on 25 Nov 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

A Heap-based Buffer Overflow vulnerability is present in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share versions 12.6.1204.216 and prior that could allow an attacker to disclose information or execute arbitrary code.

Weakness: CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2025-65085?

It affects 5 products.


Products: Ashlar Argon, Ashlar Cobalt, Ashlar Cobalt Share, Ashlar Lithium, Ashlar Xenon.

## How do I fix CVE-2025-65085?

No fix has been published for CVE-2025-65085 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-65085 being exploited?

There is no known exploitation of CVE-2025-65085 in the wild and no public exploit code.

## Other vulnerabilities in Ashlar Cobalt

- [CVE-2025-65086](https://insights.sbomify.com/CVE-2025-65086/): Out-of-bounds write in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share (high 8.4)
- [CVE-2025-65087](https://insights.sbomify.com/CVE-2025-65087/): Out-of-bounds read in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share (high 8.4)
- [CVE-2025-65088](https://insights.sbomify.com/CVE-2025-65088/): Out-of-bounds read in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share (high 8.4)
- [CVE-2025-65084](https://insights.sbomify.com/CVE-2025-65084/): Out-of-bounds Write in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share (high 8.4)
- [CVE-2025-41392](https://insights.sbomify.com/CVE-2025-41392/): Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt Share Out-of-bounds Read (high 8.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-65085 and fix it if it is affected.

What it is: CVE-2025-65085 is a high-severity memory corruption vulnerability in Ashlar Cobalt, published on 25 Nov 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2025-65085 in the wild and no public exploit code.

Affected product: Ashlar Cobalt. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-65085/ (Markdown: https://insights.sbomify.com/CVE-2025-65085/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-65085
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-65085
- OSV: https://osv.dev/vulnerability/CVE-2025-65085

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-65085/
Summaries are generated and may contain mistakes; the official description above is the record.